Finding the Fourth Proportional to 12,613.40, 18,915.69 and 3,726.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.40 : 18,915.69 = 3,726.38 : x
2. Step 2: Convert to fraction form
   12,613.40/18,915.69 = 3,726.38/x
3. Step 3: Cross multiply
   12,613.40x = 18,915.69 × 3,726.38
4. Step 4: Simplify right side
   12,613.40x = 70,487,110.17
5. Step 5: Solve for x
   x = 70,487,110.17/12,613.40
6. Step 6: Final answer
   x = 5,588.27